Improvement in



./,' batemedqan. 2, 1872 To all whom' 'it mag/concern:

lfrom theJire-urm.

Alxrrnn STATES 'ATENT' Ish/IAC M. ,MILBANK, or GREENFIELD HILL, CONNECTICUT.

IMPROVEMENT IN. METALLIC CAR-rennais.-

Specificetion forming part of Letters Patent Nc. 122,399, dated `Jenrmry 2,187.2; anteduted December 20, 1871.

Be it known that I,IsnAC M. MILBANK, of, Greeniield Hill, in the county of Feirlield and Sta-te ot'Gonneeticut, have'invented und inude an Improvement in Cartridges. for Fire-Arms; and the following is declared to 'be a. Correct description thereof.

' This invention relates to e cartridge with'a, sheet-metal cese `and met-:il base.

Before my present invention cartridge-Ceses V had been made of a, sheet-metal cy-liiuler'with exenged head or base inserted into one end of seid cylinder and secured byA solder; and in Let-ters Patent No. 62,283, :t metallic case with@ flange -is shown witheI metallic bese'. soldered inside the case. In the insta-nee first named theforce of the explosion tends to' sepL erete the cylinder from the base, end t, e base In the Yin-l is costly and difficult to make. stance lest 11a-med, the sheet metal of the case has to be pent up to form e ilenge, and in so doing is liable to be broken.

My present invention allows for the sheet- 4 metal cese being mede without e enge there'- in, the tlengc being produced Abye disk'.of metal soldered to the sheet metal of Vthe cstrtridge-case atthepoutside of the closed end.

Thereby the explosion is coniii'iedwithin'the sheet metal of the case and doesnot tend to sepa-ratethe disk, and the disk ects to eid in keeping the case inshepe, and its edge forms the tlenge, by which theseme is withdrawn Iam enabled to ina-ke the sheet-metal case of zinc, because there is ne flange to the seme, and the bese cenbe of cheep metal, as the powder does not corrie inf to Contact therewith to any considerable extent.

In the drawing, Figure 1 is e section of the cartridge complete. Fig. 2 is e sectiomshowing the"bnse 'end 'cese seperately. Fig. 3 is e section of the base in e slightly-modified form, and Fig. 4 is en end View of the cese.

The sheet-metal case@ is made with the cylindrcel sides lA end ila-tend 2 of one piece of sheet metal; but there -isvno projecting en ge,

es heretofore usueland b is the metallic base. in the form of e dik, slightly larger in diemeterthan the case, so es lo form e Bange tolthe same when'the buse b is soldered or brazed to `the end 20 the cese e. I find that bymaking smell holes through the end 2 of the casca, as seen )et 3, the solder will have albetter hold, because it .een be put into the case,

'and when lmelted will run through these holes and ilow between the bese and case. A

I lind that by constructing the cart-ridgeoase in this 'manner I em. enabled to employ sheet-zinc for such ease, the same being cheaper than the metals heretofore used, end equel ly servicable; and. the soldering can be reliubly ei'ected, beca-use the heut een be applied 'to the disk by e .heated plete upon which the disk ispl-nced; and hence the zinc will not be subjectedl to the risk of injury by the heut,

yand the solder will flow und unite theperts By employing the holes and introducing solder in the shellIem enabled to use eniueh lighter metal, because the entire bese is strengthened by the solder end iirmly connected with fthe. exterior bese'.Y r y 1n the cen-ter of the .disk b is .an opening, through which eceessisgiven in igniting the powder in the'cartridge.; und I remark that en y desired primer or fuhninutingmateriel' may be employed; and for the purpose of accommodating primers already known the disk .may have e recess,.as shown i'n Fie'. 3, and

the end 2 ofthe case is to have un opening inV it of e sieesuliicient for the convexportionrof the busen-t the beck of this recess, and in this .manner the parts ere gnidedwhen set together so that the disk end Vease vwill be concentric. In order to" form en enyil for :t shallow priming-cup I ineke the projecting tent .5 in the center ot' the sheet-metal end 2 of :t die-meter smaller than the opening in the heed, and upon this the primere can be placed, the edges thereof being within the hole in `the vbase b, said bese forming e ring around theprimer. This churacterof certridgecuseisvery cheap,

- strong, reliable, easily mede. and not liable to injury inuse.

I find thatl the'certridge-case mede of zinc,`

` as aforesaid, is preferablel to various metals .that huye heretofore been usedr because 1t does not become corrod'ed'and liebleto wedge into the' barrel, end hence can be inserted 0r withdrawn with easehand that is the case rrrCE.

even if'the sheet metal shell does not fit lper*- fectly, the-quality of vthis metal allowing it to yield slightly-Without injury.

I claim as my invention- 1. The netallio base having arecess for reoeiving the primer, which recess passes into an opening at the rear end of the sheet-metal case and. guides the parts while the base is' being soldered to the-case, as set forth.

2. The man A5 projecting from the ena 2 df the sheet-metal case '01., in combination with the unnulafi` base b 'that surrounds said tent,`

und is soldered to the end 2: of the case, substantia-lvly as set forth. f Signed by me .this 27th day of Apri1, 1871. I. M. MILBANK.

Witnesses:

GEO. D. WALKER, GEO. T. PINGKNEY. 

